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UI Post-UTME Mathematics 2024 (Model questions) Question 9

Question 9

Measures of Central Tendency

The mean of five numbers is 12. Four of them are 10, 15, 8 and 14. What is the fifth number?

  1. A.20
  2. B.60
  3. C.13
  4. D.17
Show the answer and explanation

Answer: C (13)

Explanation

The five numbers add to 5 × 12 = 60; the four given add to 47, so the fifth is 13.